Uncaught exception with spk pack

I'm running into a an error when trying to package an app. spk dev seems to work fine and I can interact with the app within my sandstorm environment but I get the following when I try to run the spk dev my-app.spk command:

*** Uncaught exception *** sandstorm/spk.c++:1171: failed: expected children.empty(); got symlink, expected directory; target = /lib stack: 61306d 61186a 61094e 61089c 662ce3 663246